Quick summary

• Most common causes: bad apps, system glitches, overheating, low storage, or a failing battery.
• First steps: remove case, cool the phone, boot into Safe Mode, and uninstall recent apps.
• If that fails: clear cache, update Android, reset settings, or factory reset as a last resort.

Step 1 – Basic checks before deeper fixes

1. Remove case and let the phone cool
   Overheating can trigger automatic restarts. Remove any thick case, keep the phone out of direct sun, and avoid gaming or charging while troubleshooting.
2. Check battery level and charging behavior
   If the phone restarts more often when the battery is low or when you plug it in, you may have a weak battery or bad charging cable. Try a different charger and cable.
3. Free up storage space
   Very low storage can cause crashes and boot loops. Aim for at least 10–20% free space by deleting unused apps, old downloads, and large videos.

Step 2 – Boot into Safe Mode to test apps

Safe Mode loads Android with only core system apps. If the phone stops restarting in Safe Mode, a third‑party app is likely causing the problem.

How to enter Safe Mode (general method)

1. Press and hold the Power button until the power menu appears.
2. Tap and hold Power off until you see a Safe Mode prompt.
3. Tap OK to reboot into Safe Mode.

Note: On some phones, you may need to search “Safe Mode <your brand>” for exact steps.

What to do in Safe Mode

• Use the phone normally for a while. If it no longer restarts, a third‑party app is the culprit.
• Uninstall recently installed or updated apps. Start with apps added just before the problem began.
• Remove battery‑intensive or “cleaner/booster” apps. These often cause instability.

Step 3 – Clear cache and update Android

Clear app cache for problem apps

1. Open Settings > Apps.
2. Tap the app you suspect (browser, social media, games, etc.).
3. Tap Storage > Clear cache.

Clear system cache (if your phone supports it)

On some devices, you can clear the system cache from Recovery Mode:

1. Power off the phone.
2. Press and hold Volume Up + Power (or the key combo for your brand) to enter Recovery Mode.
3. Use volume keys to highlight Wipe cache partition, then confirm with the Power button.
4. Reboot the phone.

Update Android and apps

1. Go to Settings > System > System update (or Software update).
2. Install any available updates.
3. Open Google Play Store > Manage apps & device > Update all.

Step 4 – Reset settings (without erasing data)

If the phone still keeps restarting, you can reset system settings without wiping your personal files. This can fix misconfigured options that cause instability.

1. Open Settings > System > Reset options.
2. Choose Reset Wi‑Fi, mobile & Bluetooth and confirm.
3. If the issue persists, choose Reset all settings (wording may vary by brand).

Your photos, videos, and apps usually remain intact, but some preferences will revert to default.

Step 5 – Factory reset (last resort)

If none of the previous steps stop the restarting, the system may be badly corrupted. A factory reset reinstalls Android and wipes user data, so back up important files first.

Backup first

• Use Google Backup in Settings.
• Copy photos and videos to a PC or cloud storage.
• Note down important app logins.

How to factory reset

1. Open Settings > System > Reset options.
2. Tap Erase all data (factory reset).
3. Confirm and wait for the process to complete.

If the phone still keeps restarting even after a factory reset, you’re likely dealing with a hardware problem (battery, motherboard, or power IC).

Step 6 – When it’s probably hardware

• Phone restarts when moved or bumped: possible loose internal connection.
• Phone restarts only when charging: possible charging port or battery issue.
• Phone overheats quickly, then restarts: failing battery or CPU thermal problem.

At this point, contact a repair shop or your phone manufacturer’s support. Mention that the phone keeps restarting even after a factory reset—this tells them it’s likely hardware.

Related Android troubleshooting guides

• Android Phone Won’t Detect SIM Card
• Android Phone Stuck on Logo Screen
• Android Phone Overheating and Shutting Down
• Android Phone Troubleshooting Hub

FAQ – Android phone keeps restarting